SB2024032065 - Multiple vulnerabilities in OpenVPN server for Windows

Description

This security bulletin contains information about 4 secuirty vulnerabilities.

1) Stack-based buffer overflow (CVE-ID: CVE-2024-27459)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the interactive service component. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.

The vulnerability affects Windows installations only.

2) Improper access control (CVE-ID: CVE-2024-24974)

The vulnerability allows a remote user to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions to the interactive service pipe. A remote user can bypass implemented security restrictions and gain unauthorized access to the application.

The vulnerability affects Windows installations only.

3) Untrusted search path (CVE-ID: CVE-2024-27903)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to usage of an untrusted search path in plugins. A local user can place a malicious binary into a specific location on the system and execute arbitrary code with escalated privileges.

The vulnerability affects Windows installations only.

4) Integer overflow (CVE-ID: CVE-2024-1305)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to integer overflow in !TapSharedSendPacket within the Windows TAP driver. A local user can trigger integer overflow and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://github.com/OpenVPN/openvpn/releases/tag/v2.6.10
• https://github.com/OpenVPN/openvpn/releases/tag/v2.5.10